. Its a regular/legitimate commercial product that comes in a quart-size metal can with oil and fuel stabilizer already mixed in. I think its like $8 for a can, but if you aren't doing much trimming, this could be an option for you. (I don't remember the name of this product,
It's about $5-6 a a can at HD, Lowes,etc has a shelf life of 2 years and no ethanol. I am using it in all my trimmers,blowers, and chainsaws.